Icon for a portion of a display screen



The single FIGURE is a front view of an icon for a portion of a display screen.

The broken line showing of two elements and the unshaded areas within them form no part of the claimed design. The broken line showing of the portion of a display screen is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an icon for a portion of a display screen, as shown and described. 